Samsung Air Conditioner Error Code OUTDOOR_YELLOW_GREEN_FLICKER

This error code indicates a heatsink sensor error in the outdoor unit. The heatsink sensor monitors the temperature of the IPM module, which drives the compressor. When the sensor signal is lost or reads an implausible value, the system faults out and displays this LED pattern to alert a technician. It is a protective shutdown designed to prevent damage to the inverter drive components.

No, the system will typically not operate normally once this fault is active, as it is a protective shutdown. Attempting to force operation with a compromised heatsink sensor defeats the thermal protection built into the IPM circuit, which could result in overheating and permanent damage to the inverter components or compressor. The unit should remain off until the fault is diagnosed and resolved.

A power reset may temporarily clear the fault code, but if the underlying hardware problem persists, the error will return once the system attempts to read the heatsink sensor again. Resetting without repairing the root cause does not fix the problem and could mask the issue temporarily. A proper diagnosis of the IPM PIN 24 and 25 solder joints, the thermistor, and the wiring harness is necessary to achieve a lasting resolution.

This fault requires working inside the outdoor unit near high-voltage inverter components, including the IPM module. The first diagnostic step involves inspecting solder joints at specific IPM pins, which requires electronics knowledge and proper safety precautions including full power disconnect and capacitor discharge. This repair is best handled by a qualified HVAC or appliance technician. A knowledgeable DIYer with electronics experience may be able to perform a visual inspection of the solder joints but should avoid probing live circuits.

Repair costs depend heavily on the root cause. If the issue is simply a failed solder joint that can be reflowed, labor costs may range from $80 to $200. If the heatsink thermistor requires replacement, parts and labor combined typically range from $100 to $300. Replacement of a failed IPM module is the most expensive scenario, with parts and labor potentially ranging from $300 to $700 or more depending on the unit model.